git.sesse.net Git - ffmpeg/blob - libavcodec/vaapi_encode_h264.c

   1 /*
   2  * This file is part of FFmpeg.
   3  *
   4  * FFmpeg is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * FFmpeg is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with FFmpeg; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  17  */
  18
  19 #include <string.h>
  20
  21 #include <va/va.h>
  22 #include <va/va_enc_h264.h>
  23
  24 #include "libavutil/avassert.h"
  25 #include "libavutil/common.h"
  26 #include "libavutil/internal.h"
  27 #include "libavutil/opt.h"
  28
  29 #include "avcodec.h"
  30 #include "cbs.h"
  31 #include "cbs_h264.h"
  32 #include "h264.h"
  33 #include "h264_levels.h"
  34 #include "h264_sei.h"
  35 #include "internal.h"
  36 #include "vaapi_encode.h"
  37
  38 enum {
  39     SEI_TIMING         = 0x01,
  40     SEI_IDENTIFIER     = 0x02,
  41     SEI_RECOVERY_POINT = 0x04,
  42 };
  43
  44 // Random (version 4) ISO 11578 UUID.
  45 static const uint8_t vaapi_encode_h264_sei_identifier_uuid[16] = {
  46     0x59, 0x94, 0x8b, 0x28, 0x11, 0xec, 0x45, 0xaf,
  47     0x96, 0x75, 0x19, 0xd4, 0x1f, 0xea, 0xa9, 0x4d,
  48 };
  49
  50 typedef struct VAAPIEncodeH264Picture {
  51     int frame_num;
  52     int pic_order_cnt;
  53
  54     int64_t last_idr_frame;
  55     uint16_t idr_pic_id;
  56
  57     int primary_pic_type;
  58     int slice_type;
  59
  60     int cpb_delay;
  61     int dpb_delay;
  62 } VAAPIEncodeH264Picture;
  63
  64 typedef struct VAAPIEncodeH264Context {
  65     VAAPIEncodeContext common;
  66
  67     // User options.
  68     int qp;
  69     int quality;
  70     int coder;
  71     int aud;
  72     int sei;
  73     int profile;
  74     int level;
  75
  76     // Derived settings.
  77     int mb_width;
  78     int mb_height;
  79
  80     int fixed_qp_idr;
  81     int fixed_qp_p;
  82     int fixed_qp_b;
  83
  84     int dpb_frames;
  85
  86     // Writer structures.
  87     CodedBitstreamContext *cbc;
  88     CodedBitstreamFragment current_access_unit;
  89
  90     H264RawAUD   raw_aud;
  91     H264RawSPS   raw_sps;
  92     H264RawPPS   raw_pps;
  93     H264RawSEI   raw_sei;
  94     H264RawSlice raw_slice;
  95
  96     H264RawSEIBufferingPeriod      sei_buffering_period;
  97     H264RawSEIPicTiming            sei_pic_timing;
  98     H264RawSEIRecoveryPoint        sei_recovery_point;
  99     H264RawSEIUserDataUnregistered sei_identifier;
 100     char                          *sei_identifier_string;
 101
 102     int aud_needed;
 103     int sei_needed;
 104     int sei_cbr_workaround_needed;
 105 } VAAPIEncodeH264Context;
 106
 107
 108 static int vaapi_encode_h264_write_access_unit(AVCodecContext *avctx,
 109                                                char *data, size_t *data_len,
 110                                                CodedBitstreamFragment *au)
 111 {
 112     VAAPIEncodeH264Context *priv = avctx->priv_data;
 113     int err;
 114
 115     err = ff_cbs_write_fragment_data(priv->cbc, au);
 116     if (err < 0) {
 117         av_log(avctx, AV_LOG_ERROR, "Failed to write packed header.\n");
 118         return err;
 119     }
 120
 121     if (*data_len < 8 * au->data_size - au->data_bit_padding) {
 122         av_log(avctx, AV_LOG_ERROR, "Access unit too large: "
 123                "%zu < %zu.\n", *data_len,
 124                8 * au->data_size - au->data_bit_padding);
 125         return AVERROR(ENOSPC);
 126     }
 127
 128     memcpy(data, au->data, au->data_size);
 129     *data_len = 8 * au->data_size - au->data_bit_padding;
 130
 131     return 0;
 132 }
 133
 134 static int vaapi_encode_h264_add_nal(AVCodecContext *avctx,
 135                                      CodedBitstreamFragment *au,
 136                                      void *nal_unit)
 137 {
 138     H264RawNALUnitHeader *header = nal_unit;
 139     int err;
 140
 141     err = ff_cbs_insert_unit_content(au, -1,
 142                                      header->nal_unit_type, nal_unit, NULL);
 143     if (err < 0) {
 144         av_log(avctx, AV_LOG_ERROR, "Failed to add NAL unit: "
 145                "type = %d.\n", header->nal_unit_type);
 146         return err;
 147     }
 148
 149     return 0;
 150 }
 151
 152 static int vaapi_encode_h264_write_sequence_header(AVCodecContext *avctx,
 153                                                    char *data, size_t *data_len)
 154 {
 155     VAAPIEncodeH264Context *priv = avctx->priv_data;
 156     CodedBitstreamFragment   *au = &priv->current_access_unit;
 157     int err;
 158
 159     if (priv->aud_needed) {
 160         err = vaapi_encode_h264_add_nal(avctx, au, &priv->raw_aud);
 161         if (err < 0)
 162             goto fail;
 163         priv->aud_needed = 0;
 164     }
 165
 166     err = vaapi_encode_h264_add_nal(avctx, au, &priv->raw_sps);
 167     if (err < 0)
 168         goto fail;
 169
 170     err = vaapi_encode_h264_add_nal(avctx, au, &priv->raw_pps);
 171     if (err < 0)
 172         goto fail;
 173
 174     err = vaapi_encode_h264_write_access_unit(avctx, data, data_len, au);
 175 fail:
 176     ff_cbs_fragment_reset(au);
 177     return err;
 178 }
 179
 180 static int vaapi_encode_h264_write_slice_header(AVCodecContext *avctx,
 181                                                 VAAPIEncodePicture *pic,
 182                                                 VAAPIEncodeSlice *slice,
 183                                                 char *data, size_t *data_len)
 184 {
 185     VAAPIEncodeH264Context *priv = avctx->priv_data;
 186     CodedBitstreamFragment   *au = &priv->current_access_unit;
 187     int err;
 188
 189     if (priv->aud_needed) {
 190         err = vaapi_encode_h264_add_nal(avctx, au, &priv->raw_aud);
 191         if (err < 0)
 192             goto fail;
 193         priv->aud_needed = 0;
 194     }
 195
 196     err = vaapi_encode_h264_add_nal(avctx, au, &priv->raw_slice);
 197     if (err < 0)
 198         goto fail;
 199
 200     err = vaapi_encode_h264_write_access_unit(avctx, data, data_len, au);
 201 fail:
 202     ff_cbs_fragment_reset(au);
 203     return err;
 204 }
 205
 206 static int vaapi_encode_h264_write_extra_header(AVCodecContext *avctx,
 207                                                 VAAPIEncodePicture *pic,
 208                                                 int index, int *type,
 209                                                 char *data, size_t *data_len)
 210 {
 211     VAAPIEncodeH264Context *priv = avctx->priv_data;
 212     CodedBitstreamFragment   *au = &priv->current_access_unit;
 213     int err, i;
 214
 215     if (priv->sei_needed) {
 216         H264RawSEI *sei = &priv->raw_sei;
 217
 218         if (priv->aud_needed) {
 219             err = vaapi_encode_h264_add_nal(avctx, au, &priv->raw_aud);
 220             if (err < 0)
 221                 goto fail;
 222             priv->aud_needed = 0;
 223         }
 224
 225         *sei = (H264RawSEI) {
 226             .nal_unit_header = {
 227                 .nal_unit_type = H264_NAL_SEI,
 228             },
 229         };
 230
 231         i = 0;
 232
 233         if (priv->sei_needed & SEI_IDENTIFIER) {
 234             sei->payload[i].payload_type = H264_SEI_TYPE_USER_DATA_UNREGISTERED;
 235             sei->payload[i].payload.user_data_unregistered = priv->sei_identifier;
 236             ++i;
 237         }
 238         if (priv->sei_needed & SEI_TIMING) {
 239             if (pic->type == PICTURE_TYPE_IDR) {
 240                 sei->payload[i].payload_type = H264_SEI_TYPE_BUFFERING_PERIOD;
 241                 sei->payload[i].payload.buffering_period = priv->sei_buffering_period;
 242                 ++i;
 243             }
 244             sei->payload[i].payload_type = H264_SEI_TYPE_PIC_TIMING;
 245             sei->payload[i].payload.pic_timing = priv->sei_pic_timing;
 246             ++i;
 247         }
 248         if (priv->sei_needed & SEI_RECOVERY_POINT) {
 249             sei->payload[i].payload_type = H264_SEI_TYPE_RECOVERY_POINT;
 250             sei->payload[i].payload.recovery_point = priv->sei_recovery_point;
 251             ++i;
 252         }
 253
 254         sei->payload_count = i;
 255         av_assert0(sei->payload_count > 0);
 256
 257         err = vaapi_encode_h264_add_nal(avctx, au, sei);
 258         if (err < 0)
 259             goto fail;
 260         priv->sei_needed = 0;
 261
 262         err = vaapi_encode_h264_write_access_unit(avctx, data, data_len, au);
 263         if (err < 0)
 264             goto fail;
 265
 266         ff_cbs_fragment_reset(au);
 267
 268         *type = VAEncPackedHeaderRawData;
 269         return 0;
 270
 271 #if !CONFIG_VAAPI_1
 272     } else if (priv->sei_cbr_workaround_needed) {
 273         // Insert a zero-length header using the old SEI type.  This is
 274         // required to avoid triggering broken behaviour on Intel platforms
 275         // in CBR mode where an invalid SEI message is generated by the
 276         // driver and inserted into the stream.
 277         *data_len = 0;
 278         *type = VAEncPackedHeaderH264_SEI;
 279         priv->sei_cbr_workaround_needed = 0;
 280         return 0;
 281 #endif
 282
 283     } else {
 284         return AVERROR_EOF;
 285     }
 286
 287 fail:
 288     ff_cbs_fragment_reset(au);
 289     return err;
 290 }
 291
 292 static int vaapi_encode_h264_init_sequence_params(AVCodecContext *avctx)
 293 {
 294     VAAPIEncodeContext                *ctx = avctx->priv_data;
 295     VAAPIEncodeH264Context           *priv = avctx->priv_data;
 296     H264RawSPS                        *sps = &priv->raw_sps;
 297     H264RawPPS                        *pps = &priv->raw_pps;
 298     VAEncSequenceParameterBufferH264 *vseq = ctx->codec_sequence_params;
 299     VAEncPictureParameterBufferH264  *vpic = ctx->codec_picture_params;
 300
 301     memset(sps, 0, sizeof(*sps));
 302     memset(pps, 0, sizeof(*pps));
 303
 304     sps->nal_unit_header.nal_ref_idc   = 3;
 305     sps->nal_unit_header.nal_unit_type = H264_NAL_SPS;
 306
 307     sps->profile_idc = avctx->profile & 0xff;
 308
 309     if (avctx->profile == FF_PROFILE_H264_CONSTRAINED_BASELINE ||
 310         avctx->profile == FF_PROFILE_H264_MAIN)
 311         sps->constraint_set1_flag = 1;
 312
 313     if (avctx->profile == FF_PROFILE_H264_HIGH)
 314         sps->constraint_set3_flag = ctx->gop_size == 1;
 315
 316     if (avctx->profile == FF_PROFILE_H264_MAIN ||
 317         avctx->profile == FF_PROFILE_H264_HIGH) {
 318         sps->constraint_set4_flag = 1;
 319         sps->constraint_set5_flag = ctx->b_per_p == 0;
 320     }
 321
 322     if (ctx->gop_size == 1)
 323         priv->dpb_frames = 0;
 324     else
 325         priv->dpb_frames = 1 + ctx->max_b_depth;
 326
 327     if (avctx->level != FF_LEVEL_UNKNOWN) {
 328         sps->level_idc = avctx->level;
 329     } else {
 330         const H264LevelDescriptor *level;
 331         int framerate;
 332
 333         if (avctx->framerate.num > 0 && avctx->framerate.den > 0)
 334             framerate = avctx->framerate.num / avctx->framerate.den;
 335         else
 336             framerate = 0;
 337
 338         level = ff_h264_guess_level(sps->profile_idc,
 339                                     avctx->bit_rate,
 340                                     framerate,
 341                                     priv->mb_width  * 16,
 342                                     priv->mb_height * 16,
 343                                     priv->dpb_frames);
 344         if (level) {
 345             av_log(avctx, AV_LOG_VERBOSE, "Using level %s.\n", level->name);
 346             if (level->constraint_set3_flag)
 347                 sps->constraint_set3_flag = 1;
 348             sps->level_idc = level->level_idc;
 349         } else {
 350             av_log(avctx, AV_LOG_WARNING, "Stream will not conform "
 351                    "to any level: using level 6.2.\n");
 352             sps->level_idc = 62;
 353         }
 354     }
 355
 356     sps->seq_parameter_set_id = 0;
 357     sps->chroma_format_idc    = 1;
 358
 359     sps->log2_max_frame_num_minus4 = 4;
 360     sps->pic_order_cnt_type        = 0;
 361     sps->log2_max_pic_order_cnt_lsb_minus4 = 4;
 362
 363     sps->max_num_ref_frames = priv->dpb_frames;
 364
 365     sps->pic_width_in_mbs_minus1        = priv->mb_width  - 1;
 366     sps->pic_height_in_map_units_minus1 = priv->mb_height - 1;
 367
 368     sps->frame_mbs_only_flag = 1;
 369     sps->direct_8x8_inference_flag = 1;
 370
 371     if (avctx->width  != 16 * priv->mb_width ||
 372         avctx->height != 16 * priv->mb_height) {
 373         sps->frame_cropping_flag = 1;
 374
 375         sps->frame_crop_left_offset   = 0;
 376         sps->frame_crop_right_offset  =
 377             (16 * priv->mb_width - avctx->width) / 2;
 378         sps->frame_crop_top_offset    = 0;
 379         sps->frame_crop_bottom_offset =
 380             (16 * priv->mb_height - avctx->height) / 2;
 381     } else {
 382         sps->frame_cropping_flag = 0;
 383     }
 384
 385     sps->vui_parameters_present_flag = 1;
 386
 387     if (avctx->sample_aspect_ratio.num != 0 &&
 388         avctx->sample_aspect_ratio.den != 0) {
 389         static const AVRational sar_idc[] = {
 390             {   0,  0 },
 391             {   1,  1 }, {  12, 11 }, {  10, 11 }, {  16, 11 },
 392             {  40, 33 }, {  24, 11 }, {  20, 11 }, {  32, 11 },
 393             {  80, 33 }, {  18, 11 }, {  15, 11 }, {  64, 33 },
 394             { 160, 99 }, {   4,  3 }, {   3,  2 }, {   2,  1 },
 395         };
 396         int num, den, i;
 397         av_reduce(&num, &den, avctx->sample_aspect_ratio.num,
 398                   avctx->sample_aspect_ratio.den, 65535);
 399         for (i = 0; i < FF_ARRAY_ELEMS(sar_idc); i++) {
 400             if (num == sar_idc[i].num &&
 401                 den == sar_idc[i].den) {
 402                 sps->vui.aspect_ratio_idc = i;
 403                 break;
 404             }
 405         }
 406         if (i >= FF_ARRAY_ELEMS(sar_idc)) {
 407             sps->vui.aspect_ratio_idc = 255;
 408             sps->vui.sar_width  = num;
 409             sps->vui.sar_height = den;
 410         }
 411         sps->vui.aspect_ratio_info_present_flag = 1;
 412     }
 413
 414     // Unspecified video format, from table E-2.
 415     sps->vui.video_format             = 5;
 416     sps->vui.video_full_range_flag    =
 417         avctx->color_range == AVCOL_RANGE_JPEG;
 418     sps->vui.colour_primaries         = avctx->color_primaries;
 419     sps->vui.transfer_characteristics = avctx->color_trc;
 420     sps->vui.matrix_coefficients      = avctx->colorspace;
 421     if (avctx->color_primaries != AVCOL_PRI_UNSPECIFIED ||
 422         avctx->color_trc       != AVCOL_TRC_UNSPECIFIED ||
 423         avctx->colorspace      != AVCOL_SPC_UNSPECIFIED)
 424         sps->vui.colour_description_present_flag = 1;
 425     if (avctx->color_range     != AVCOL_RANGE_UNSPECIFIED ||
 426         sps->vui.colour_description_present_flag)
 427         sps->vui.video_signal_type_present_flag = 1;
 428
 429     if (avctx->chroma_sample_location != AVCHROMA_LOC_UNSPECIFIED) {
 430         sps->vui.chroma_loc_info_present_flag = 1;
 431         sps->vui.chroma_sample_loc_type_top_field    =
 432         sps->vui.chroma_sample_loc_type_bottom_field =
 433             avctx->chroma_sample_location - 1;
 434     }
 435
 436     sps->vui.timing_info_present_flag = 1;
 437     if (avctx->framerate.num > 0 && avctx->framerate.den > 0) {
 438         sps->vui.num_units_in_tick = avctx->framerate.den;
 439         sps->vui.time_scale        = 2 * avctx->framerate.num;
 440         sps->vui.fixed_frame_rate_flag = 1;
 441     } else {
 442         sps->vui.num_units_in_tick = avctx->time_base.num;
 443         sps->vui.time_scale        = 2 * avctx->time_base.den;
 444         sps->vui.fixed_frame_rate_flag = 0;
 445     }
 446
 447     if (priv->sei & SEI_TIMING) {
 448         H264RawHRD *hrd = &sps->vui.nal_hrd_parameters;
 449         H264RawSEIBufferingPeriod *bp = &priv->sei_buffering_period;
 450
 451         sps->vui.nal_hrd_parameters_present_flag = 1;
 452
 453         hrd->cpb_cnt_minus1 = 0;
 454
 455         // Try to scale these to a sensible range so that the
 456         // golomb encode of the value is not overlong.
 457         hrd->bit_rate_scale =
 458             av_clip_uintp2(av_log2(ctx->va_bit_rate) - 15 - 6, 4);
 459         hrd->bit_rate_value_minus1[0] =
 460             (ctx->va_bit_rate >> hrd->bit_rate_scale + 6) - 1;
 461
 462         hrd->cpb_size_scale =
 463             av_clip_uintp2(av_log2(ctx->hrd_params.buffer_size) - 15 - 4, 4);
 464         hrd->cpb_size_value_minus1[0] =
 465             (ctx->hrd_params.buffer_size >> hrd->cpb_size_scale + 4) - 1;
 466
 467         // CBR mode as defined for the HRD cannot be achieved without filler
 468         // data, so this flag cannot be set even with VAAPI CBR modes.
 469         hrd->cbr_flag[0] = 0;
 470
 471         hrd->initial_cpb_removal_delay_length_minus1 = 23;
 472         hrd->cpb_removal_delay_length_minus1         = 23;
 473         hrd->dpb_output_delay_length_minus1          = 7;
 474         hrd->time_offset_length                      = 0;
 475
 476         bp->seq_parameter_set_id = sps->seq_parameter_set_id;
 477
 478         // This calculation can easily overflow 32 bits.
 479         bp->nal.initial_cpb_removal_delay[0] = 90000 *
 480             (uint64_t)ctx->hrd_params.initial_buffer_fullness /
 481             ctx->hrd_params.buffer_size;
 482         bp->nal.initial_cpb_removal_delay_offset[0] = 0;
 483     } else {
 484         sps->vui.nal_hrd_parameters_present_flag = 0;
 485         sps->vui.low_delay_hrd_flag = 1 - sps->vui.fixed_frame_rate_flag;
 486     }
 487
 488     sps->vui.bitstream_restriction_flag    = 1;
 489     sps->vui.motion_vectors_over_pic_boundaries_flag = 1;
 490     sps->vui.log2_max_mv_length_horizontal = 15;
 491     sps->vui.log2_max_mv_length_vertical   = 15;
 492     sps->vui.max_num_reorder_frames        = ctx->max_b_depth;
 493     sps->vui.max_dec_frame_buffering       = ctx->max_b_depth + 1;
 494
 495     pps->nal_unit_header.nal_ref_idc = 3;
 496     pps->nal_unit_header.nal_unit_type = H264_NAL_PPS;
 497
 498     pps->pic_parameter_set_id = 0;
 499     pps->seq_parameter_set_id = 0;
 500
 501     pps->entropy_coding_mode_flag =
 502         !(sps->profile_idc == FF_PROFILE_H264_BASELINE ||
 503           sps->profile_idc == FF_PROFILE_H264_EXTENDED ||
 504           sps->profile_idc == FF_PROFILE_H264_CAVLC_444);
 505     if (!priv->coder && pps->entropy_coding_mode_flag)
 506         pps->entropy_coding_mode_flag = 0;
 507
 508     pps->num_ref_idx_l0_default_active_minus1 = 0;
 509     pps->num_ref_idx_l1_default_active_minus1 = 0;
 510
 511     pps->pic_init_qp_minus26 = priv->fixed_qp_idr - 26;
 512
 513     if (sps->profile_idc == FF_PROFILE_H264_BASELINE ||
 514         sps->profile_idc == FF_PROFILE_H264_EXTENDED ||
 515         sps->profile_idc == FF_PROFILE_H264_MAIN) {
 516         pps->more_rbsp_data = 0;
 517     } else {
 518         pps->more_rbsp_data = 1;
 519
 520         pps->transform_8x8_mode_flag = 1;
 521     }
 522
 523     *vseq = (VAEncSequenceParameterBufferH264) {
 524         .seq_parameter_set_id = sps->seq_parameter_set_id,
 525         .level_idc        = sps->level_idc,
 526         .intra_period     = ctx->gop_size,
 527         .intra_idr_period = ctx->gop_size,
 528         .ip_period        = ctx->b_per_p + 1,
 529
 530         .bits_per_second       = ctx->va_bit_rate,
 531         .max_num_ref_frames    = sps->max_num_ref_frames,
 532         .picture_width_in_mbs  = sps->pic_width_in_mbs_minus1 + 1,
 533         .picture_height_in_mbs = sps->pic_height_in_map_units_minus1 + 1,
 534
 535         .seq_fields.bits = {
 536             .chroma_format_idc                 = sps->chroma_format_idc,
 537             .frame_mbs_only_flag               = sps->frame_mbs_only_flag,
 538             .mb_adaptive_frame_field_flag      = sps->mb_adaptive_frame_field_flag,
 539             .seq_scaling_matrix_present_flag   = sps->seq_scaling_matrix_present_flag,
 540             .direct_8x8_inference_flag         = sps->direct_8x8_inference_flag,
 541             .log2_max_frame_num_minus4         = sps->log2_max_frame_num_minus4,
 542             .pic_order_cnt_type                = sps->pic_order_cnt_type,
 543             .log2_max_pic_order_cnt_lsb_minus4 = sps->log2_max_pic_order_cnt_lsb_minus4,
 544             .delta_pic_order_always_zero_flag  = sps->delta_pic_order_always_zero_flag,
 545         },
 546
 547         .bit_depth_luma_minus8   = sps->bit_depth_luma_minus8,
 548         .bit_depth_chroma_minus8 = sps->bit_depth_chroma_minus8,
 549
 550         .frame_cropping_flag      = sps->frame_cropping_flag,
 551         .frame_crop_left_offset   = sps->frame_crop_left_offset,
 552         .frame_crop_right_offset  = sps->frame_crop_right_offset,
 553         .frame_crop_top_offset    = sps->frame_crop_top_offset,
 554         .frame_crop_bottom_offset = sps->frame_crop_bottom_offset,
 555
 556         .vui_parameters_present_flag = sps->vui_parameters_present_flag,
 557
 558         .vui_fields.bits = {
 559             .aspect_ratio_info_present_flag = sps->vui.aspect_ratio_info_present_flag,
 560             .timing_info_present_flag       = sps->vui.timing_info_present_flag,
 561             .bitstream_restriction_flag     = sps->vui.bitstream_restriction_flag,
 562             .log2_max_mv_length_horizontal  = sps->vui.log2_max_mv_length_horizontal,
 563             .log2_max_mv_length_vertical    = sps->vui.log2_max_mv_length_vertical,
 564         },
 565
 566         .aspect_ratio_idc  = sps->vui.aspect_ratio_idc,
 567         .sar_width         = sps->vui.sar_width,
 568         .sar_height        = sps->vui.sar_height,
 569         .num_units_in_tick = sps->vui.num_units_in_tick,
 570         .time_scale        = sps->vui.time_scale,
 571     };
 572
 573     *vpic = (VAEncPictureParameterBufferH264) {
 574         .CurrPic = {
 575             .picture_id = VA_INVALID_ID,
 576             .flags      = VA_PICTURE_H264_INVALID,
 577         },
 578
 579         .coded_buf = VA_INVALID_ID,
 580
 581         .pic_parameter_set_id = pps->pic_parameter_set_id,
 582         .seq_parameter_set_id = pps->seq_parameter_set_id,
 583
 584         .pic_init_qp                  = pps->pic_init_qp_minus26 + 26,
 585         .num_ref_idx_l0_active_minus1 = pps->num_ref_idx_l0_default_active_minus1,
 586         .num_ref_idx_l1_active_minus1 = pps->num_ref_idx_l1_default_active_minus1,
 587
 588         .chroma_qp_index_offset        = pps->chroma_qp_index_offset,
 589         .second_chroma_qp_index_offset = pps->second_chroma_qp_index_offset,
 590
 591         .pic_fields.bits = {
 592             .entropy_coding_mode_flag        = pps->entropy_coding_mode_flag,
 593             .weighted_pred_flag              = pps->weighted_pred_flag,
 594             .weighted_bipred_idc             = pps->weighted_bipred_idc,
 595             .constrained_intra_pred_flag     = pps->constrained_intra_pred_flag,
 596             .transform_8x8_mode_flag         = pps->transform_8x8_mode_flag,
 597             .deblocking_filter_control_present_flag =
 598                 pps->deblocking_filter_control_present_flag,
 599             .redundant_pic_cnt_present_flag  = pps->redundant_pic_cnt_present_flag,
 600             .pic_order_present_flag          =
 601                 pps->bottom_field_pic_order_in_frame_present_flag,
 602             .pic_scaling_matrix_present_flag = pps->pic_scaling_matrix_present_flag,
 603         },
 604     };
 605
 606     return 0;
 607 }
 608
 609 static int vaapi_encode_h264_init_picture_params(AVCodecContext *avctx,
 610                                                  VAAPIEncodePicture *pic)
 611 {
 612     VAAPIEncodeContext               *ctx = avctx->priv_data;
 613     VAAPIEncodeH264Context          *priv = avctx->priv_data;
 614     VAAPIEncodeH264Picture          *hpic = pic->priv_data;
 615     VAAPIEncodePicture              *prev = pic->prev;
 616     VAAPIEncodeH264Picture         *hprev = prev ? prev->priv_data : NULL;
 617     VAEncPictureParameterBufferH264 *vpic = pic->codec_picture_params;
 618     int i;
 619
 620     if (pic->type == PICTURE_TYPE_IDR) {
 621         av_assert0(pic->display_order == pic->encode_order);
 622
 623         hpic->frame_num      = 0;
 624         hpic->last_idr_frame = pic->display_order;
 625         hpic->idr_pic_id     = hprev ? hprev->idr_pic_id + 1 : 0;
 626
 627         hpic->primary_pic_type = 0;
 628         hpic->slice_type       = 7;
 629     } else {
 630         av_assert0(prev);
 631
 632         hpic->frame_num = hprev->frame_num + prev->is_reference;
 633
 634         hpic->last_idr_frame = hprev->last_idr_frame;
 635         hpic->idr_pic_id     = hprev->idr_pic_id;
 636
 637         if (pic->type == PICTURE_TYPE_I) {
 638             hpic->slice_type       = 7;
 639             hpic->primary_pic_type = 0;
 640         } else if (pic->type == PICTURE_TYPE_P) {
 641             hpic->slice_type       = 5;
 642             hpic->primary_pic_type = 1;
 643         } else {
 644             hpic->slice_type       = 6;
 645             hpic->primary_pic_type = 2;
 646         }
 647     }
 648     hpic->pic_order_cnt = pic->display_order - hpic->last_idr_frame;
 649     hpic->dpb_delay     = pic->display_order - pic->encode_order + ctx->max_b_depth;
 650     hpic->cpb_delay     = pic->encode_order - hpic->last_idr_frame;
 651
 652     if (priv->aud) {
 653         priv->aud_needed = 1;
 654         priv->raw_aud = (H264RawAUD) {
 655             .nal_unit_header = {
 656                 .nal_unit_type = H264_NAL_AUD,
 657             },
 658             .primary_pic_type  = hpic->primary_pic_type,
 659         };
 660     } else {
 661         priv->aud_needed = 0;
 662     }
 663
 664     priv->sei_needed = 0;
 665
 666     if (priv->sei & SEI_IDENTIFIER && pic->encode_order == 0)
 667         priv->sei_needed |= SEI_IDENTIFIER;
 668 #if !CONFIG_VAAPI_1
 669     if (ctx->va_rc_mode == VA_RC_CBR)
 670         priv->sei_cbr_workaround_needed = 1;
 671 #endif
 672
 673     if (priv->sei & SEI_TIMING) {
 674         priv->sei_pic_timing = (H264RawSEIPicTiming) {
 675             .cpb_removal_delay = 2 * hpic->cpb_delay,
 676             .dpb_output_delay  = 2 * hpic->dpb_delay,
 677         };
 678
 679         priv->sei_needed |= SEI_TIMING;
 680     }
 681
 682     if (priv->sei & SEI_RECOVERY_POINT && pic->type == PICTURE_TYPE_I) {
 683         priv->sei_recovery_point = (H264RawSEIRecoveryPoint) {
 684             .recovery_frame_cnt = 0,
 685             .exact_match_flag   = 1,
 686             .broken_link_flag   = ctx->b_per_p > 0,
 687         };
 688
 689         priv->sei_needed |= SEI_RECOVERY_POINT;
 690     }
 691
 692     vpic->CurrPic = (VAPictureH264) {
 693         .picture_id          = pic->recon_surface,
 694         .frame_idx           = hpic->frame_num,
 695         .flags               = 0,
 696         .TopFieldOrderCnt    = hpic->pic_order_cnt,
 697         .BottomFieldOrderCnt = hpic->pic_order_cnt,
 698     };
 699
 700     for (i = 0; i < pic->nb_refs; i++) {
 701         VAAPIEncodePicture      *ref = pic->refs[i];
 702         VAAPIEncodeH264Picture *href;
 703
 704         av_assert0(ref && ref->encode_order < pic->encode_order);
 705         href = ref->priv_data;
 706
 707         vpic->ReferenceFrames[i] = (VAPictureH264) {
 708             .picture_id          = ref->recon_surface,
 709             .frame_idx           = href->frame_num,
 710             .flags               = VA_PICTURE_H264_SHORT_TERM_REFERENCE,
 711             .TopFieldOrderCnt    = href->pic_order_cnt,
 712             .BottomFieldOrderCnt = href->pic_order_cnt,
 713         };
 714     }
 715     for (; i < FF_ARRAY_ELEMS(vpic->ReferenceFrames); i++) {
 716         vpic->ReferenceFrames[i] = (VAPictureH264) {
 717             .picture_id = VA_INVALID_ID,
 718             .flags      = VA_PICTURE_H264_INVALID,
 719         };
 720     }
 721
 722     vpic->coded_buf = pic->output_buffer;
 723
 724     vpic->frame_num = hpic->frame_num;
 725
 726     vpic->pic_fields.bits.idr_pic_flag       = (pic->type == PICTURE_TYPE_IDR);
 727     vpic->pic_fields.bits.reference_pic_flag = (pic->type != PICTURE_TYPE_B);
 728
 729     return 0;
 730 }
 731
 732 static void vaapi_encode_h264_default_ref_pic_list(AVCodecContext *avctx,
 733                                                    VAAPIEncodePicture *pic,
 734                                                    VAAPIEncodePicture **rpl0,
 735                                                    VAAPIEncodePicture **rpl1,
 736                                                    int *rpl_size)
 737 {
 738     VAAPIEncodePicture *prev;
 739     VAAPIEncodeH264Picture *hp, *hn, *hc;
 740     int i, j, n = 0;
 741
 742     prev = pic->prev;
 743     av_assert0(prev);
 744     hp = pic->priv_data;
 745
 746     for (i = 0; i < pic->prev->nb_dpb_pics; i++) {
 747         hn = prev->dpb[i]->priv_data;
 748         av_assert0(hn->frame_num < hp->frame_num);
 749
 750         if (pic->type == PICTURE_TYPE_P) {
 751             for (j = n; j > 0; j--) {
 752                 hc = rpl0[j - 1]->priv_data;
 753                 av_assert0(hc->frame_num != hn->frame_num);
 754                 if (hc->frame_num > hn->frame_num)
 755                     break;
 756                 rpl0[j] = rpl0[j - 1];
 757             }
 758             rpl0[j] = prev->dpb[i];
 759
 760         } else if (pic->type == PICTURE_TYPE_B) {
 761             for (j = n; j > 0; j--) {
 762                 hc = rpl0[j - 1]->priv_data;
 763                 av_assert0(hc->pic_order_cnt != hp->pic_order_cnt);
 764                 if (hc->pic_order_cnt < hp->pic_order_cnt) {
 765                     if (hn->pic_order_cnt > hp->pic_order_cnt ||
 766                         hn->pic_order_cnt < hc->pic_order_cnt)
 767                         break;
 768                 } else {
 769                     if (hn->pic_order_cnt > hc->pic_order_cnt)
 770                         break;
 771                 }
 772                 rpl0[j] = rpl0[j - 1];
 773             }
 774             rpl0[j] = prev->dpb[i];
 775
 776             for (j = n; j > 0; j--) {
 777                 hc = rpl1[j - 1]->priv_data;
 778                 av_assert0(hc->pic_order_cnt != hp->pic_order_cnt);
 779                 if (hc->pic_order_cnt > hp->pic_order_cnt) {
 780                     if (hn->pic_order_cnt < hp->pic_order_cnt ||
 781                         hn->pic_order_cnt > hc->pic_order_cnt)
 782                         break;
 783                 } else {
 784                     if (hn->pic_order_cnt < hc->pic_order_cnt)
 785                         break;
 786                 }
 787                 rpl1[j] = rpl1[j - 1];
 788             }
 789             rpl1[j] = prev->dpb[i];
 790         }
 791
 792         ++n;
 793     }
 794
 795     if (pic->type == PICTURE_TYPE_B) {
 796         for (i = 0; i < n; i++) {
 797             if (rpl0[i] != rpl1[i])
 798                 break;
 799         }
 800         if (i == n)
 801             FFSWAP(VAAPIEncodePicture*, rpl1[0], rpl1[1]);
 802     }
 803
 804     if (pic->type == PICTURE_TYPE_P ||
 805         pic->type == PICTURE_TYPE_B) {
 806         av_log(avctx, AV_LOG_DEBUG, "Default RefPicList0 for fn=%d/poc=%d:",
 807                hp->frame_num, hp->pic_order_cnt);
 808         for (i = 0; i < n; i++) {
 809             hn = rpl0[i]->priv_data;
 810             av_log(avctx, AV_LOG_DEBUG, "  fn=%d/poc=%d",
 811                    hn->frame_num, hn->pic_order_cnt);
 812         }
 813         av_log(avctx, AV_LOG_DEBUG, "\n");
 814     }
 815     if (pic->type == PICTURE_TYPE_B) {
 816         av_log(avctx, AV_LOG_DEBUG, "Default RefPicList1 for fn=%d/poc=%d:",
 817                hp->frame_num, hp->pic_order_cnt);
 818         for (i = 0; i < n; i++) {
 819             hn = rpl1[i]->priv_data;
 820             av_log(avctx, AV_LOG_DEBUG, "  fn=%d/poc=%d",
 821                    hn->frame_num, hn->pic_order_cnt);
 822         }
 823         av_log(avctx, AV_LOG_DEBUG, "\n");
 824     }
 825
 826     *rpl_size = n;
 827 }
 828
 829 static int vaapi_encode_h264_init_slice_params(AVCodecContext *avctx,
 830                                                VAAPIEncodePicture *pic,
 831                                                VAAPIEncodeSlice *slice)
 832 {
 833     VAAPIEncodeH264Context          *priv = avctx->priv_data;
 834     VAAPIEncodeH264Picture          *hpic = pic->priv_data;
 835     VAAPIEncodePicture              *prev = pic->prev;
 836     H264RawSPS                       *sps = &priv->raw_sps;
 837     H264RawPPS                       *pps = &priv->raw_pps;
 838     H264RawSliceHeader                *sh = &priv->raw_slice.header;
 839     VAEncPictureParameterBufferH264 *vpic = pic->codec_picture_params;
 840     VAEncSliceParameterBufferH264 *vslice = slice->codec_slice_params;
 841     int i, j;
 842
 843     if (pic->type == PICTURE_TYPE_IDR) {
 844         sh->nal_unit_header.nal_unit_type = H264_NAL_IDR_SLICE;
 845         sh->nal_unit_header.nal_ref_idc   = 3;
 846     } else {
 847         sh->nal_unit_header.nal_unit_type = H264_NAL_SLICE;
 848         sh->nal_unit_header.nal_ref_idc   = pic->is_reference;
 849     }
 850
 851     sh->first_mb_in_slice = slice->block_start;
 852     sh->slice_type        = hpic->slice_type;
 853
 854     sh->pic_parameter_set_id = pps->pic_parameter_set_id;
 855
 856     sh->frame_num = hpic->frame_num &
 857         ((1 << (4 + sps->log2_max_frame_num_minus4)) - 1);
 858     sh->idr_pic_id = hpic->idr_pic_id;
 859     sh->pic_order_cnt_lsb = hpic->pic_order_cnt &
 860         ((1 << (4 + sps->log2_max_pic_order_cnt_lsb_minus4)) - 1);
 861
 862     sh->direct_spatial_mv_pred_flag = 1;
 863
 864     if (pic->type == PICTURE_TYPE_B)
 865         sh->slice_qp_delta = priv->fixed_qp_b - (pps->pic_init_qp_minus26 + 26);
 866     else if (pic->type == PICTURE_TYPE_P)
 867         sh->slice_qp_delta = priv->fixed_qp_p - (pps->pic_init_qp_minus26 + 26);
 868     else
 869         sh->slice_qp_delta = priv->fixed_qp_idr - (pps->pic_init_qp_minus26 + 26);
 870
 871     if (pic->is_reference && pic->type != PICTURE_TYPE_IDR) {
 872         VAAPIEncodePicture *discard_list[MAX_DPB_SIZE];
 873         int discard = 0, keep = 0;
 874
 875         // Discard everything which is in the DPB of the previous frame but
 876         // not in the DPB of this one.
 877         for (i = 0; i < prev->nb_dpb_pics; i++) {
 878             for (j = 0; j < pic->nb_dpb_pics; j++) {
 879                 if (prev->dpb[i] == pic->dpb[j])
 880                     break;
 881             }
 882             if (j == pic->nb_dpb_pics) {
 883                 discard_list[discard] = prev->dpb[i];
 884                 ++discard;
 885             } else {
 886                 ++keep;
 887             }
 888         }
 889         av_assert0(keep <= priv->dpb_frames);
 890
 891         if (discard == 0) {
 892             sh->adaptive_ref_pic_marking_mode_flag = 0;
 893         } else {
 894             sh->adaptive_ref_pic_marking_mode_flag = 1;
 895             for (i = 0; i < discard; i++) {
 896                 VAAPIEncodeH264Picture *old = discard_list[i]->priv_data;
 897                 av_assert0(old->frame_num < hpic->frame_num);
 898                 sh->mmco[i].memory_management_control_operation = 1;
 899                 sh->mmco[i].difference_of_pic_nums_minus1 =
 900                     hpic->frame_num - old->frame_num - 1;
 901             }
 902             sh->mmco[i].memory_management_control_operation = 0;
 903         }
 904     }
 905
 906     // If the intended references are not the first entries of RefPicListN
 907     // by default, use ref-pic-list-modification to move them there.
 908     if (pic->type == PICTURE_TYPE_P || pic->type == PICTURE_TYPE_B) {
 909         VAAPIEncodePicture *def_l0[MAX_DPB_SIZE], *def_l1[MAX_DPB_SIZE];
 910         VAAPIEncodeH264Picture *href;
 911         int n;
 912
 913         vaapi_encode_h264_default_ref_pic_list(avctx, pic,
 914                                                def_l0, def_l1, &n);
 915
 916         if (pic->type == PICTURE_TYPE_P) {
 917             int need_rplm = 0;
 918             for (i = 0; i < pic->nb_refs; i++) {
 919                 av_assert0(pic->refs[i]);
 920                 if (pic->refs[i] != def_l0[i])
 921                     need_rplm = 1;
 922             }
 923
 924             sh->ref_pic_list_modification_flag_l0 = need_rplm;
 925             if (need_rplm) {
 926                 int pic_num = hpic->frame_num;
 927                 for (i = 0; i < pic->nb_refs; i++) {
 928                     href = pic->refs[i]->priv_data;
 929                     av_assert0(href->frame_num != pic_num);
 930                     if (href->frame_num < pic_num) {
 931                         sh->rplm_l0[i].modification_of_pic_nums_idc = 0;
 932                         sh->rplm_l0[i].abs_diff_pic_num_minus1 =
 933                             pic_num - href->frame_num - 1;
 934                     } else {
 935                         sh->rplm_l0[i].modification_of_pic_nums_idc = 1;
 936                         sh->rplm_l0[i].abs_diff_pic_num_minus1 =
 937                             href->frame_num - pic_num - 1;
 938                     }
 939                     pic_num = href->frame_num;
 940                 }
 941                 sh->rplm_l0[i].modification_of_pic_nums_idc = 3;
 942             }
 943
 944         } else {
 945             int need_rplm_l0 = 0, need_rplm_l1 = 0;
 946             int n0 = 0, n1 = 0;
 947             for (i = 0; i < pic->nb_refs; i++) {
 948                 av_assert0(pic->refs[i]);
 949                 href = pic->refs[i]->priv_data;
 950                 av_assert0(href->pic_order_cnt != hpic->pic_order_cnt);
 951                 if (href->pic_order_cnt < hpic->pic_order_cnt) {
 952                     if (pic->refs[i] != def_l0[n0])
 953                         need_rplm_l0 = 1;
 954                     ++n0;
 955                 } else {
 956                     if (pic->refs[i] != def_l1[n1])
 957                         need_rplm_l1 = 1;
 958                     ++n1;
 959                 }
 960             }
 961
 962             sh->ref_pic_list_modification_flag_l0 = need_rplm_l0;
 963             if (need_rplm_l0) {
 964                 int pic_num = hpic->frame_num;
 965                 for (i = j = 0; i < pic->nb_refs; i++) {
 966                     href = pic->refs[i]->priv_data;
 967                     if (href->pic_order_cnt > hpic->pic_order_cnt)
 968                         continue;
 969                     av_assert0(href->frame_num != pic_num);
 970                     if (href->frame_num < pic_num) {
 971                         sh->rplm_l0[j].modification_of_pic_nums_idc = 0;
 972                         sh->rplm_l0[j].abs_diff_pic_num_minus1 =
 973                             pic_num - href->frame_num - 1;
 974                     } else {
 975                         sh->rplm_l0[j].modification_of_pic_nums_idc = 1;
 976                         sh->rplm_l0[j].abs_diff_pic_num_minus1 =
 977                             href->frame_num - pic_num - 1;
 978                     }
 979                     pic_num = href->frame_num;
 980                     ++j;
 981                 }
 982                 av_assert0(j == n0);
 983                 sh->rplm_l0[j].modification_of_pic_nums_idc = 3;
 984             }
 985
 986             sh->ref_pic_list_modification_flag_l1 = need_rplm_l1;
 987             if (need_rplm_l1) {
 988                 int pic_num = hpic->frame_num;
 989                 for (i = j = 0; i < pic->nb_refs; i++) {
 990                     href = pic->refs[i]->priv_data;
 991                     if (href->pic_order_cnt < hpic->pic_order_cnt)
 992                         continue;
 993                     av_assert0(href->frame_num != pic_num);
 994                     if (href->frame_num < pic_num) {
 995                         sh->rplm_l1[j].modification_of_pic_nums_idc = 0;
 996                         sh->rplm_l1[j].abs_diff_pic_num_minus1 =
 997                             pic_num - href->frame_num - 1;
 998                     } else {
 999                         sh->rplm_l1[j].modification_of_pic_nums_idc = 1;
1000                         sh->rplm_l1[j].abs_diff_pic_num_minus1 =
1001                             href->frame_num - pic_num - 1;
1002                     }
1003                     pic_num = href->frame_num;
1004                     ++j;
1005                 }
1006                 av_assert0(j == n1);
1007                 sh->rplm_l1[j].modification_of_pic_nums_idc = 3;
1008             }
1009         }
1010     }
1011
1012     vslice->macroblock_address = slice->block_start;
1013     vslice->num_macroblocks    = slice->block_size;
1014
1015     vslice->macroblock_info = VA_INVALID_ID;
1016
1017     vslice->slice_type           = sh->slice_type % 5;
1018     vslice->pic_parameter_set_id = sh->pic_parameter_set_id;
1019     vslice->idr_pic_id           = sh->idr_pic_id;
1020
1021     vslice->pic_order_cnt_lsb = sh->pic_order_cnt_lsb;
1022
1023     vslice->direct_spatial_mv_pred_flag = sh->direct_spatial_mv_pred_flag;
1024
1025     for (i = 0; i < FF_ARRAY_ELEMS(vslice->RefPicList0); i++) {
1026         vslice->RefPicList0[i].picture_id = VA_INVALID_ID;
1027         vslice->RefPicList0[i].flags      = VA_PICTURE_H264_INVALID;
1028         vslice->RefPicList1[i].picture_id = VA_INVALID_ID;
1029         vslice->RefPicList1[i].flags      = VA_PICTURE_H264_INVALID;
1030     }
1031
1032     av_assert0(pic->nb_refs <= 2);
1033     if (pic->nb_refs >= 1) {
1034         // Backward reference for P- or B-frame.
1035         av_assert0(pic->type == PICTURE_TYPE_P ||
1036                    pic->type == PICTURE_TYPE_B);
1037         vslice->RefPicList0[0] = vpic->ReferenceFrames[0];
1038     }
1039     if (pic->nb_refs >= 2) {
1040         // Forward reference for B-frame.
1041         av_assert0(pic->type == PICTURE_TYPE_B);
1042         vslice->RefPicList1[0] = vpic->ReferenceFrames[1];
1043     }
1044
1045     vslice->slice_qp_delta = sh->slice_qp_delta;
1046
1047     return 0;
1048 }
1049
1050 static av_cold int vaapi_encode_h264_configure(AVCodecContext *avctx)
1051 {
1052     VAAPIEncodeContext      *ctx = avctx->priv_data;
1053     VAAPIEncodeH264Context *priv = avctx->priv_data;
1054     int err;
1055
1056     err = ff_cbs_init(&priv->cbc, AV_CODEC_ID_H264, avctx);
1057     if (err < 0)
1058         return err;
1059
1060     priv->mb_width  = FFALIGN(avctx->width,  16) / 16;
1061     priv->mb_height = FFALIGN(avctx->height, 16) / 16;
1062
1063     if (ctx->va_rc_mode == VA_RC_CQP) {
1064         priv->fixed_qp_p = av_clip(ctx->rc_quality, 1, 51);
1065         if (avctx->i_quant_factor > 0.0)
1066             priv->fixed_qp_idr =
1067                 av_clip((avctx->i_quant_factor * priv->fixed_qp_p +
1068                          avctx->i_quant_offset) + 0.5, 1, 51);
1069         else
1070             priv->fixed_qp_idr = priv->fixed_qp_p;
1071         if (avctx->b_quant_factor > 0.0)
1072             priv->fixed_qp_b =
1073                 av_clip((avctx->b_quant_factor * priv->fixed_qp_p +
1074                          avctx->b_quant_offset) + 0.5, 1, 51);
1075         else
1076             priv->fixed_qp_b = priv->fixed_qp_p;
1077
1078         av_log(avctx, AV_LOG_DEBUG, "Using fixed QP = "
1079                "%d / %d / %d for IDR- / P- / B-frames.\n",
1080                priv->fixed_qp_idr, priv->fixed_qp_p, priv->fixed_qp_b);
1081
1082     } else {
1083         // These still need to be  set for pic_init_qp/slice_qp_delta.
1084         priv->fixed_qp_idr = 26;
1085         priv->fixed_qp_p   = 26;
1086         priv->fixed_qp_b   = 26;
1087     }
1088
1089     if (!ctx->rc_mode->hrd) {
1090         // Timing SEI requires a mode respecting HRD parameters.
1091         priv->sei &= ~SEI_TIMING;
1092     }
1093
1094     if (priv->sei & SEI_IDENTIFIER) {
1095         const char *lavc  = LIBAVCODEC_IDENT;
1096         const char *vaapi = VA_VERSION_S;
1097         const char *driver;
1098         int len;
1099
1100         memcpy(priv->sei_identifier.uuid_iso_iec_11578,
1101                vaapi_encode_h264_sei_identifier_uuid,
1102                sizeof(priv->sei_identifier.uuid_iso_iec_11578));
1103
1104         driver = vaQueryVendorString(ctx->hwctx->display);
1105         if (!driver)
1106             driver = "unknown driver";
1107
1108         len = snprintf(NULL, 0, "%s / VAAPI %s / %s", lavc, vaapi, driver);
1109         if (len >= 0) {
1110             priv->sei_identifier_string = av_malloc(len + 1);
1111             if (!priv->sei_identifier_string)
1112                 return AVERROR(ENOMEM);
1113
1114             snprintf(priv->sei_identifier_string, len + 1,
1115                      "%s / VAAPI %s / %s", lavc, vaapi, driver);
1116
1117             priv->sei_identifier.data        = priv->sei_identifier_string;
1118             priv->sei_identifier.data_length = len + 1;
1119         }
1120     }
1121
1122     ctx->roi_quant_range = 51 + 6 * (ctx->profile->depth - 8);
1123
1124     return 0;
1125 }
1126
1127 static const VAAPIEncodeProfile vaapi_encode_h264_profiles[] = {
1128     { FF_PROFILE_H264_HIGH, 8, 3, 1, 1, VAProfileH264High },
1129     { FF_PROFILE_H264_MAIN, 8, 3, 1, 1, VAProfileH264Main },
1130     { FF_PROFILE_H264_CONSTRAINED_BASELINE,
1131                             8, 3, 1, 1, VAProfileH264ConstrainedBaseline },
1132     { FF_PROFILE_UNKNOWN }
1133 };
1134
1135 static const VAAPIEncodeType vaapi_encode_type_h264 = {
1136     .profiles              = vaapi_encode_h264_profiles,
1137
1138     .flags                 = FLAG_SLICE_CONTROL |
1139                              FLAG_B_PICTURES |
1140                              FLAG_B_PICTURE_REFERENCES |
1141                              FLAG_NON_IDR_KEY_PICTURES,
1142
1143     .default_quality       = 20,
1144
1145     .configure             = &vaapi_encode_h264_configure,
1146
1147     .picture_priv_data_size = sizeof(VAAPIEncodeH264Picture),
1148
1149     .sequence_params_size  = sizeof(VAEncSequenceParameterBufferH264),
1150     .init_sequence_params  = &vaapi_encode_h264_init_sequence_params,
1151
1152     .picture_params_size   = sizeof(VAEncPictureParameterBufferH264),
1153     .init_picture_params   = &vaapi_encode_h264_init_picture_params,
1154
1155     .slice_params_size     = sizeof(VAEncSliceParameterBufferH264),
1156     .init_slice_params     = &vaapi_encode_h264_init_slice_params,
1157
1158     .sequence_header_type  = VAEncPackedHeaderSequence,
1159     .write_sequence_header = &vaapi_encode_h264_write_sequence_header,
1160
1161     .slice_header_type     = VAEncPackedHeaderH264_Slice,
1162     .write_slice_header    = &vaapi_encode_h264_write_slice_header,
1163
1164     .write_extra_header    = &vaapi_encode_h264_write_extra_header,
1165 };
1166
1167 static av_cold int vaapi_encode_h264_init(AVCodecContext *avctx)
1168 {
1169     VAAPIEncodeContext      *ctx = avctx->priv_data;
1170     VAAPIEncodeH264Context *priv = avctx->priv_data;
1171
1172     ctx->codec = &vaapi_encode_type_h264;
1173
1174     if (avctx->profile == FF_PROFILE_UNKNOWN)
1175         avctx->profile = priv->profile;
1176     if (avctx->level == FF_LEVEL_UNKNOWN)
1177         avctx->level = priv->level;
1178     if (avctx->compression_level == FF_COMPRESSION_DEFAULT)
1179         avctx->compression_level = priv->quality;
1180
1181     // Reject unsupported profiles.
1182     switch (avctx->profile) {
1183     case FF_PROFILE_H264_BASELINE:
1184         av_log(avctx, AV_LOG_WARNING, "H.264 baseline profile is not "
1185                "supported, using constrained baseline profile instead.\n");
1186         avctx->profile = FF_PROFILE_H264_CONSTRAINED_BASELINE;
1187         break;
1188     case FF_PROFILE_H264_EXTENDED:
1189         av_log(avctx, AV_LOG_ERROR, "H.264 extended profile "
1190                "is not supported.\n");
1191         return AVERROR_PATCHWELCOME;
1192     case FF_PROFILE_H264_HIGH_10:
1193     case FF_PROFILE_H264_HIGH_10_INTRA:
1194         av_log(avctx, AV_LOG_ERROR, "H.264 10-bit profiles "
1195                "are not supported.\n");
1196         return AVERROR_PATCHWELCOME;
1197     case FF_PROFILE_H264_HIGH_422:
1198     case FF_PROFILE_H264_HIGH_422_INTRA:
1199     case FF_PROFILE_H264_HIGH_444:
1200     case FF_PROFILE_H264_HIGH_444_PREDICTIVE:
1201     case FF_PROFILE_H264_HIGH_444_INTRA:
1202     case FF_PROFILE_H264_CAVLC_444:
1203         av_log(avctx, AV_LOG_ERROR, "H.264 non-4:2:0 profiles "
1204                "are not supported.\n");
1205         return AVERROR_PATCHWELCOME;
1206     }
1207
1208     if (avctx->level != FF_LEVEL_UNKNOWN && avctx->level & ~0xff) {
1209         av_log(avctx, AV_LOG_ERROR, "Invalid level %d: must fit "
1210                "in 8-bit unsigned integer.\n", avctx->level);
1211         return AVERROR(EINVAL);
1212     }
1213
1214     ctx->desired_packed_headers =
1215         VA_ENC_PACKED_HEADER_SEQUENCE | // SPS and PPS.
1216         VA_ENC_PACKED_HEADER_SLICE    | // Slice headers.
1217         VA_ENC_PACKED_HEADER_MISC;      // SEI.
1218
1219     ctx->surface_width  = FFALIGN(avctx->width,  16);
1220     ctx->surface_height = FFALIGN(avctx->height, 16);
1221
1222     ctx->slice_block_height = ctx->slice_block_width = 16;
1223
1224     if (priv->qp > 0)
1225         ctx->explicit_qp = priv->qp;
1226
1227     return ff_vaapi_encode_init(avctx);
1228 }
1229
1230 static av_cold int vaapi_encode_h264_close(AVCodecContext *avctx)
1231 {
1232     VAAPIEncodeH264Context *priv = avctx->priv_data;
1233
1234     ff_cbs_fragment_free(&priv->current_access_unit);
1235     ff_cbs_close(&priv->cbc);
1236     av_freep(&priv->sei_identifier_string);
1237
1238     return ff_vaapi_encode_close(avctx);
1239 }
1240
1241 #define OFFSET(x) offsetof(VAAPIEncodeH264Context, x)
1242 #define FLAGS (AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM)
1243 static const AVOption vaapi_encode_h264_options[] = {
1244     VAAPI_ENCODE_COMMON_OPTIONS,
1245     VAAPI_ENCODE_RC_OPTIONS,
1246
1247     { "qp", "Constant QP (for P-frames; scaled by qfactor/qoffset for I/B)",
1248       OFFSET(qp), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 52, FLAGS },
1249     { "quality", "Set encode quality (trades off against speed, higher is faster)",
1250       OFFSET(quality), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, FLAGS },
1251     { "coder", "Entropy coder type",
1252       OFFSET(coder), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, FLAGS, "coder" },
1253         { "cavlc", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 0 }, INT_MIN, INT_MAX, FLAGS, "coder" },
1254         { "cabac", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, INT_MIN, INT_MAX, FLAGS, "coder" },
1255         { "vlc",   NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 0 }, INT_MIN, INT_MAX, FLAGS, "coder" },
1256         { "ac",    NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, INT_MIN, INT_MAX, FLAGS, "coder" },
1257
1258     { "aud", "Include AUD",
1259       OFFSET(aud), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
1260
1261     { "sei", "Set SEI to include",
1262       OFFSET(sei), AV_OPT_TYPE_FLAGS,
1263       { .i64 = SEI_IDENTIFIER | SEI_TIMING | SEI_RECOVERY_POINT },
1264       0, INT_MAX, FLAGS, "sei" },
1265     { "identifier", "Include encoder version identifier",
1266       0, AV_OPT_TYPE_CONST, { .i64 = SEI_IDENTIFIER },
1267       INT_MIN, INT_MAX, FLAGS, "sei" },
1268     { "timing", "Include timing parameters (buffering_period and pic_timing)",
1269       0, AV_OPT_TYPE_CONST, { .i64 = SEI_TIMING },
1270       INT_MIN, INT_MAX, FLAGS, "sei" },
1271     { "recovery_point", "Include recovery points where appropriate",
1272       0, AV_OPT_TYPE_CONST, { .i64 = SEI_RECOVERY_POINT },
1273       INT_MIN, INT_MAX, FLAGS, "sei" },
1274
1275     { "profile", "Set profile (profile_idc and constraint_set*_flag)",
1276       OFFSET(profile), AV_OPT_TYPE_INT,
1277       { .i64 = FF_PROFILE_UNKNOWN }, FF_PROFILE_UNKNOWN, 0xffff, FLAGS, "profile" },
1278
1279 #define PROFILE(name, value)  name, NULL, 0, AV_OPT_TYPE_CONST, \
1280       { .i64 = value }, 0, 0, FLAGS, "profile"
1281     { PROFILE("constrained_baseline", FF_PROFILE_H264_CONSTRAINED_BASELINE) },
1282     { PROFILE("main",                 FF_PROFILE_H264_MAIN) },
1283     { PROFILE("high",                 FF_PROFILE_H264_HIGH) },
1284 #undef PROFILE
1285
1286     { "level", "Set level (level_idc)",
1287       OFFSET(level), AV_OPT_TYPE_INT,
1288       { .i64 = FF_LEVEL_UNKNOWN }, FF_LEVEL_UNKNOWN, 0xff, FLAGS, "level" },
1289
1290 #define LEVEL(name, value) name, NULL, 0, AV_OPT_TYPE_CONST, \
1291       { .i64 = value }, 0, 0, FLAGS, "level"
1292     { LEVEL("1",   10) },
1293     { LEVEL("1.1", 11) },
1294     { LEVEL("1.2", 12) },
1295     { LEVEL("1.3", 13) },
1296     { LEVEL("2",   20) },
1297     { LEVEL("2.1", 21) },
1298     { LEVEL("2.2", 22) },
1299     { LEVEL("3",   30) },
1300     { LEVEL("3.1", 31) },
1301     { LEVEL("3.2", 32) },
1302     { LEVEL("4",   40) },
1303     { LEVEL("4.1", 41) },
1304     { LEVEL("4.2", 42) },
1305     { LEVEL("5",   50) },
1306     { LEVEL("5.1", 51) },
1307     { LEVEL("5.2", 52) },
1308     { LEVEL("6",   60) },
1309     { LEVEL("6.1", 61) },
1310     { LEVEL("6.2", 62) },
1311 #undef LEVEL
1312
1313     { NULL },
1314 };
1315
1316 static const AVCodecDefault vaapi_encode_h264_defaults[] = {
1317     { "b",              "0"   },
1318     { "bf",             "2"   },
1319     { "g",              "120" },
1320     { "i_qfactor",      "1"   },
1321     { "i_qoffset",      "0"   },
1322     { "b_qfactor",      "6/5" },
1323     { "b_qoffset",      "0"   },
1324     { "qmin",           "-1"  },
1325     { "qmax",           "-1"  },
1326     { NULL },
1327 };
1328
1329 static const AVClass vaapi_encode_h264_class = {
1330     .class_name = "h264_vaapi",
1331     .item_name  = av_default_item_name,
1332     .option     = vaapi_encode_h264_options,
1333     .version    = LIBAVUTIL_VERSION_INT,
1334 };
1335
1336 AVCodec ff_h264_vaapi_encoder = {
1337     .name           = "h264_vaapi",
1338     .long_name      = NULL_IF_CONFIG_SMALL("H.264/AVC (VAAPI)"),
1339     .type           = AVMEDIA_TYPE_VIDEO,
1340     .id             = AV_CODEC_ID_H264,
1341     .priv_data_size = sizeof(VAAPIEncodeH264Context),
1342     .init           = &vaapi_encode_h264_init,
1343     .receive_packet = &ff_vaapi_encode_receive_packet,
1344     .close          = &vaapi_encode_h264_close,
1345     .priv_class     = &vaapi_encode_h264_class,
1346     .capabilities   = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_HARDWARE,
1347     .caps_internal  = FF_CODEC_CAP_INIT_CLEANUP,
1348     .defaults       = vaapi_encode_h264_defaults,
1349     .pix_fmts = (const enum AVPixelFormat[]) {
1350         AV_PIX_FMT_VAAPI,
1351         AV_PIX_FMT_NONE,
1352     },
1353     .hw_configs     = ff_vaapi_encode_hw_configs,
1354     .wrapper_name   = "vaapi",
1355 };